DD is 14 mo. She has 4 teeth, all in the front, 2 on top & 2 on the bottom. Last week she started tapping them together. I don't know if she likes the feel or the sound or both, but that seemed fine. But yesterday she started grinding them. The sound is driving me nuts...mostly because I'm concerned that she's doing damage. Has anyone else BTDT? Discussed it with ped or dentist?